TRex Bio, Inc.
TRXB- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0002139097
In the last 90 days, TRex Bio, Inc. insiders filed 2 open-market purchases and 0 sales; no institution reported holding it in 13F filings for Q2 2026; no superinvestor holds it.
Four kinds of short-selling data, each measuring something different:
- Short interest: shares sold short and not yet bought back, as of a settlement date. FINRA publishes it twice a month, about eight business days after the settlement date.
- Daily short volume: shares sold short each day in off-exchange trades reported to FINRA. It counts trades, not open positions, and is published the next day.
- Fails-to-deliver: shares not delivered by the settlement date. The SEC publishes them twice a month, about two weeks late.
- ATS (dark pool) volume: weekly volume on alternative trading systems and other off-exchange venues. FINRA publishes it two to four weeks after the week.
More in the glossary.
Short interest
Shares sold short and not yet bought back, from FINRA, on every settlement date in the last two years.
FINRA has reported no short interest for TRXB.
Fails-to-deliver
Shares that weren't delivered by the settlement date, from the SEC, for the last 30 dates with fails. The price is the previous day's closing price published by the SEC.
The SEC has reported no fails-to-deliver for TRXB.
Daily short volume
Off-exchange short-sale volume, not short interest: shares sold short each day in trades reported to FINRA, for the last 30 trading days.
The short volume ratio isn't a sentiment gauge: market makers sell short to fill buy orders and to hedge, so short sales are usually about half of off-exchange volume.
| Trade date | Short volume | Short exempt | Off-exchange volume | Short volume ratio |
|---|---|---|---|---|
| Oct 16, 2026 | 16,333 | 0 | 28,878 | 56.6% |
| Oct 15, 2026 | 8,456 | 0 | 24,543 | 34.5% |
| Oct 14, 2026 | 61,036 | 0 | 101,118 | 60.4% |
| Oct 13, 2026 | 31,626 | 0 | 55,744 | 56.7% |
| Oct 12, 2026 | 46,849 | 0 | 108,604 | 43.1% |
ATS (dark pool) volume
Weekly volume on alternative trading systems (ATS) and other off-exchange (OTC) venues, from FINRA, for the last 12 weeks. ATS share is ATS volume ÷ (ATS + OTC volume), not a share of all trading.
FINRA has reported no ATS or OTC volume for TRXB.